Customer.io Outage History
Uptime record, past incidents, and downtime history for Customer.io.
Checking current status...
90-Day Trend
Monthly Uptime
| Month | Uptime | Days Tracked | Days with Issues |
|---|---|---|---|
| July 2026 | 77.8% | 9 | 2 |
| June 2026 | 73.3% | 30 | 8 |
| May 2026 | 90.3% | 31 | 3 |
| April 2026 | 90.5% | 21 | 2 |
Uptime is calculated from daily worst-status snapshots. A day with any non-operational status counts as a day with issues.
Daily Status (Last 91 Days)
Apr 10
Today
Operational
Degraded
Partial Outage
Major Outage
Maintenance
No Data
Incident History
July 2026
User Interface is currently unavailable for some users in EU. Data processing delays
Started: Jul 3, 9:07 AM
monitoring
Processing is actively recovering. We apologize for the disruption this caused and will continue monitoring until it's fully caught up.
Jul 3, 10:25 AM
identified
The Customer.io UI is back online. We're continuing to work on system stability to confirm the issue is fully resolved. Processing is recovering but still delayed
Jul 3, 9:44 AM
investigating
Our team is currently investigating an issue where the Customer.io dashboard (fly.customer.io) is unavailable for some users in EU. We're also looking into potential data processing delays.
Jul 3, 9:07 AM
User Interface is currently unavailable, data processing delays
Started: Jul 2, 1:51 PM
monitoring
The UI is back up and delays are actively recovering. We sincerely apologize for the inconvenience and appreciate your patience.
Jul 2, 1:59 PM
investigating
Our team is currently investigating an issue where the Customer.io dashboard (fly.customer.io) is unavailable. We're also looking into potential data processing delays.
Jul 2, 1:51 PM
June 2026
Some customers are currently unable to access the account Billing page in our UI
Started: Jun 18, 8:06 PM
monitoring
We've identified the issue and access to the Billing page has been restored. We thank you for your patience!
Jun 18, 8:29 PM
investigating
We're looking into an issue where https://fly.customer.io/settings/billing/ isn't loading for some customers. We apologize for the inconvenience.
Jun 18, 8:06 PM
Investigating Connectivity Issues
Started: Jun 13, 9:18 PM
monitoring
A fix has been implemented and the systems are recovering.
We are monitoring UI for any other issue.
Jun 13, 11:46 PM
identified
The team has identified the issue and is actively working on a fix
Jun 13, 10:21 PM
investigating
We are aware of an issue affecting access to our web application. Customers may encounter ERR_CONNECTION_REFUSED when attempting to access the UI.
At this time, we are not aware of any impact beyond UI accessibility. Message processing and delivery continue to operate normally.
Our team is actively investigating the issue and working to restore full service as quickly as possible.
We will provide updates as more information becomes available.
Jun 13, 9:18 PM
Delays in processing requests
Started: Jun 10, 4:45 AM
investigating
Identified the issue, still processing backlog
Jun 10, 4:56 AM
investigating
Our team is aware of an issue affecting Customer IO EU and US systems . We are looking into this and gathering more details.
Jun 10, 4:45 AM
AI Agent and LLM Campaign Actions Disruption
Started: Jun 9, 3:49 PM
monitoring
A fix has been implemented and we are monitoring the results.
Jun 9, 4:47 PM
identified
Our engineers have identified the issue that is causing disruption. We are working on a resolution and will provide an update shortly. Thank you for your patience.
Jun 9, 4:33 PM
investigating
We are currently investigating an issue affecting our AI Agent and LLM actions within campaigns. Some customers may be experiencing disruption or delays with these features. We will provide an update as soon as we have more information. Thank you for your patience!
Jun 9, 3:49 PM
Some customers seeing delays setting up Pipelines in new EU workspaces
Started: Jun 5, 12:30 PM
monitoring
A fix has been implemented and we are monitoring the results.
Jun 5, 1:12 PM
investigating
We are currently investigating a delay affecting the setup of Pipelines in newly created workspaces in our EU region. Customers creating new workspaces may experience longer than expected wait times before Pipelines become available.
Our team is actively working on this and we will post another update shortly. Thank you for your patience.
Jun 5, 12:57 PM
Salesforce and Hubspot syncs might be delayed for some EU customers
Started: Jun 4, 11:50 PM
monitoring
We have rolled out a fix and we're monitoring closely.
Jun 5, 12:44 AM
identified
We've identified an issue affecting some EU customers' Salesforce and Hubspot syncs. Our team is working on a fix.
Jun 4, 11:50 PM
Customer.io UI is currently inaccessible
Started: Jun 4, 1:34 PM
monitoring
We've got a fix in place, and the UI is available once again. Thank you for your patience!
Jun 4, 1:39 PM
investigating
Our team is aware of this issue and are digging into it right now. We apologize for the inconvenience and will be back with an update as soon as possible.
Jun 4, 1:34 PM
UI inaccessible
Started: Jun 2, 9:18 PM
monitoring
We have rolled out a fix for the remaining UI-related issues and are watching system behavior closely.
Jun 2, 10:43 PM
identified
Our team has identified additional UI-related issues affecting some customers. We are working on a fix now.
Jun 2, 10:25 PM
monitoring
A fix has been deployed for the issue affecting access to the UI. We are monitoring performance and customer feedback.
Jun 2, 9:33 PM
investigating
Our team is aware of an issue affecting access to the Customer.io UI and we are working to identify the cause.
Jun 2, 9:18 PM
Reverse ETL Syncs not being run for some EU Customers
Started: Jun 1, 11:40 AM
monitoring
A fix has been deployed for the issue affecting Reverse ETL syncs in EU workspaces. We are continuing to monitor this.
Jun 1, 11:44 AM
investigating
We are currently investigating an issue affecting Reverse ETL syncs for some EU customers.
Jun 1, 11:40 AM
May 2026
Some customers are seeing broadcast delivery delays (emails, push notifications, and webhooks)
Started: May 29, 4:26 PM
monitoring
We have a resolution in place and are monitoring message throughput recovery now. Thank you for your patience!
May 29, 4:51 PM
identified
We've identified the issue and are working towards a resolution now.
May 29, 4:40 PM
investigating
Our engineers are aware of an issue where messages may be showing as "queued". We're investigating this now. Thank you for your patience!
May 29, 4:26 PM
Customers in the EU region may experience delays in message sending
Started: May 25, 3:27 PM
monitoring
A fix has been implemented and we are monitoring the results.
May 25, 3:58 PM
investigating
We are currently investigating this issue.
May 25, 3:27 PM
Some customers in our EU region may experience errors and delays
Started: May 6, 4:00 PM
monitoring
The UI is available as expected, and we are monitoring before marking this as fully resolved. Thank you again for your patience!
May 6, 4:14 PM
identified
Our engineers are looking into an issue where some workspaces aren't loading as expected. Processing and deliveries may be delayed. We're working to get this resolved and will post an update soon. Thank you for your patience!
May 6, 4:00 PM
April 2026
Delay in Salesforce & Hubspot data-in integrations
Started: Apr 20, 7:52 PM
monitoring
We have identified the issue, released a fix, and are currently monitoring integrations.
Apr 20, 8:04 PM
investigating
We are currently investigating an issue impacting Salesforce and Hubspot data-in integrations in the US region.
Apr 20, 7:52 PM
Customer.io UI is currently unavailable for some customers
Started: Apr 20, 4:50 PM
monitoring
The UI is available as expected, and we are monitoring before marking this as fully resolved. Thank you again for your patience!
Apr 20, 5:03 PM
investigating
Our engineers are looking into an issue where some workspaces aren't loading as expected. We're working to get this resolved and will post an update soon. Thank you for your patience!
Apr 20, 4:55 PM
Some customers in our EU region may experience errors and delays
Started: Apr 17, 8:07 PM
monitoring
A fix has been implemented and we are monitoring the results.
Apr 17, 8:13 PM
identified
The issue has been identified and a fix is being implemented.
Apr 17, 8:08 PM
investigating
We are currently investigating this issue.
Apr 17, 8:07 PM
Integration Destinations UI Disruption
Started: Apr 13, 6:26 PM
identified
The issue has been identified in the UI and a fix is being deployed.
Apr 13, 6:28 PM
investigating
Our team is aware of an issue affecting Integrations with destinations in EU/US. We are looking into this and gathering more details. Data import and export is still working, only the UI is effected.
Apr 13, 6:26 PM
EU Region API Processing Delays
Started: Apr 7, 4:46 PM
investigating
We are continuing to investigate this and will be back again as soon as we have an update. Thank you for your continued patience!
Apr 7, 5:26 PM
investigating
Some customers in our EU region may be experiencing delays with processing data sent in through our API. Our team is investigating the cause and will provide an update soon. Thank you for your patience!
Apr 7, 4:46 PM
March 2026
Domain Verification Currently Unavailable
Started: Mar 16, 9:30 AM
monitoring
A fix has been implemented and we are monitoring the results.
Mar 16, 9:48 AM
identified
The issue has been identified and a fix is being implemented.
Mar 16, 9:38 AM
investigating
Customers are unable to add or edit unverified sending domains.
Mar 16, 9:30 AM